Population Simulator

TAIKI HIRATA商業2018-12-04

價格：免費

更新日期：2018-12-04

檔案大小：5.8 MB

目前版本：1.6.1

版本需求：需要 iOS 11.3 或以上版本。與 iPhone、iPad 及 iPod touch 相容。

支援語言：日語, 英語

"Population simulator" is an application to visually see the changes in the population by using "Logistic Map".

You can see the change in the population by the Logistic Map by a line graph and colony size.

You can observe the variation pattern of population variety by changing slightly the initial value.

Logistic Map is not only used in Population Ecology but also considered one of the starting point of Chaos Theory. I developed this app to help people who are studying Population Ecology or Chaos Theory.

＊Logistic Map may not necessarily apply to changes in population of actual organisms, because Logistic Map is a model of a simple change of the population.

■What is Logistic Map?

The Logistic Map is the map that is generated from the Logistic Function that has been devised as a variation model of the population of an organism.

It is expressed by the following function.

X(n+1) = a・X(n)・(1-X(n))

In the above equation, the meaning of each symbol is as follows.

・n:Generation (n=1,2,3,...)

・X(n):Value obtained by normalizing the Population of Generation n-th（0≦X(n)≦1)

・a:Value obtained by normalizing the Reproductive Rates（0≦a≦4)

You can calculate the population of the next generation from a population of a certain generation by using this function. In addition, You can predict the variation of the population over the long term by calculating the population of individuals repeatedly in this function.

■Pattern of Logistic Map

Logistic map vary widely depending on the value of "a".